Garg, Alka B. ; Modak, P. ; Gaitonde, D. M. ; Rao, R. S. ; Vijayakumar, V. ; Godwal, B. K. (2005) On the possibility of a phonon mediated transport anomaly in MgB2 under compression Solid State Communications, 135 (5). pp. 285-289. ISSN 0038-1098
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00381...
Related URL: http://dx.doi.org/10.1016/j.ssc.2005.05.011
Abstract
Results of electrical resistance measurements on MgB2 at ambient temperature up to 25 GPa are presented. An abrupt reduction of nearly 30% in resistance around 18 GPa is observed. Band structure calculations in the presence of a frozen-in distortion of the E2g phonon mode reveal that one of the closed Fermi sheets corresponding to the s-band opens along the Γ-A direction at this pressure. It is suggested that the anomaly observed in the resistance is due to this phonon mediated electronic topological transition (ETT).
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | A. DAC; A. MgB; D. Electrical Resistance; D. ETT; E. High Pressure |
| ID Code: | 11728 |
| Deposited On: | 13 Nov 2010 13:59 |
| Last Modified: | 02 Jun 2011 08:44 |
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